Gtf is a utility for
calculating VESA GTF modes. Given the desired horizontal and vertical resolutions
and refresh rate (in Hz), the parameters for a matching VESA GTF mode are
printed out. Two output formats are supported: mode lines suitable for
the XFree86 XF86Config(5)
file, and mode parameters suitable for the Linux
fbset(8)
utility.

This program is based on the Generalized Timing Formula
(GTF(TM)) Standard Version: 1.0, Revsion: 1.0. The GTF Excel(TM) spreadsheet,
a sample (and the definitive) implementation of the GTF Timing Standard
is available at <ftp://ftp.vesa.org/pub/GTF/VTF_V1R1.xls>.